The quality of the microphone: I was surprised! I read everywhere that it was wrong to play but I do not see the problem. The sound is very clear, we understand very well what they say. There is a little noise (due to the amplification I guess) but I do not find it annoying, and it allows us to hear. The sound card and software allow easily set the microphone (with extras such as the ability to change its vote, which could create some giggles :))
Material quality: plastic so that's cheap, but it allows him to be very light and that's nice! The helmet is very comfortable, my ears come within the headphones but these really hot ears damage.
Like many I am very happy with the headset. And what's more I read several times that he was strong, that we will see with time!